what value(s) of k would make f(x) continuous at 5?

Question

f(x)=

1. 2x^2 - 8x + 2, x ≤ 5
2. kx^2 + 6x + 7, x>5

Answer 1

f(5) = 50 - 40 + 2 = 12;

limf(x) as x→5⁺ = 25k +37 = 12; k = - 1